Thermal circuit-closer



A. HASLINGER.

THERMAL CIRCUIT CLOSER..

APPLICATION FILED MAR. 15, 1919.

Patented Aug. 9, 1921.

INVENTOR nTa- Has/Ingen BY A TTORNEY.

- of, is an electric battery UNITED STA-TES PATNT OFFICE.

ANTON EASLINGER, 017' I 'I-IILADELPHIA, PEN'NSYLVANIA.

' THERMAL Cl'RCUIT-CLOSEE.

To all whom iimy concem:

Be it known that I, ANTON HASLINGER, a subject of Austria, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented new and useful Improvements in Thermal Circuit-Closers, of which the following is a specification.

The invention relates to alarms and more particularly to thermo-electric alarms 'for use in 'connection with heat producing devices, and the object ofthe invention is to provide an alarm that may be Conveniently used inconnection with a stove'such as the usual gas stove, for the purpose of sounding` a bell or other alarm to call attention to the condition of the stove, as to the supply of the gas thereto.

Among other features the inventiomcomprehends an alarm whichmay be operated by a suitable battery or the like, and which in the event the gas supplied to the stove is blownl out or discontinued and then later on restablished, will result in an alarm being given so that the operator can shut off thesupply of as or 'ignite the same at the burner, as t e case may be.

Still further the invention comprehends an im rovement over the.. construction set forth in a United States Patent granted to meDecember 13, 1904, No. '777,506.

' In the further disclosure ofthe invention, reference is to be had to the'accompanying drawings' constituting a part of this s ecification, in which'similar characterof reference denote corresponding parts in all the views; and in which- Figure l-is a fragmentary elevation of a gas stove with parts broken away to disclose the underlying structure'.

Fig. 2-is a detailed View of the mechanism I employ, looking at the same in front elevation, with the thermostatic element in inoperative or set'position.

Fig. 3-is a similar View showing the thermostatic element inset position to complete a circuit to the alarm Fig. 4--is a fragmentary vertical sectional View taken on the line 4-4 in Fig. 3. y

Referring more articularly to the views; the numeral 10 in icates a gas stove having a suitable gas supply pipe 11, equippe d with the usual gas cock 12, and suitably arranged on the gas stove beneath a bottom- 13 there- 14 and a bell or other suitable alarm 15, a .wire a, being connected Specifiation of Letters'l'atent.

' Application filed March 15, 1919. Serial No. 282370.

from the battery with the bell, with a second wre b, from the bell to the( structure of the stove, and a third wire` c, from the battery to a bndng post l6, mounted on a substantally circularframe 17 ,of a part of my de- Vice, the binding post 16 however, being suitably insulated from the frame. u The frame 17 includes a cross piece 18 and the frame is suitably Secured in any manner to` the structure of the gas stove, and in a con- Venient place such as shown in F ig. 1.

Secured to the'frame' 17 is a thermostatic element 19, -which' in this instance is shown to consist of a curved. sensitive spring like*- member, capable of. being enlarged or reduced as to its diameter, by the action of cold or hoat, that is to say, the thermostatic element 19 has suitably hinged thereto, a contact fingef20, which in certain instances, will, due to the action of the thermostatic element 19, when the same cools after being heated, engage with the binding post 16 as shown in Fig. 3.

The frame 17 includes a projecti'on 21' and pivoted on the projection and the frame, is a cam 22, including an Operating knob 23 and an ofi set tail 24, acting in the Capacity of a weight, said tail being supported by a laterally projecting arm 26 mounted on;the thermo'static member to `maintain the circuit broken. The cam 22 is adapted for operation on the thermostatic element 19, as willthe proper electric connections are made as shown, the operation isasfollowsz Manipulation of the lever 23 causes the cam 22 engage the thermostatic'member and thus "move the "contact 'finger 20 away I'rom thebinding ost 16, the cam, 22 however bein' i retaine in contact withthe ther-' j mostatic lement, with the tail 2 disposed off at ang'angle substantially. as shown in Fig. 2. Now when the gas stove is in operation, the heat produced will' tend to cause the thermostatic element to actuate to the. endthat the thermostatic element will be moved out of engagement with the cam 22 and this a ction will enable the weight of the tail 24, to actuate the cam by gravity, so as to entirely move it out of its engagemert with the thermostaticelement and provide suflicient space for the retraction of the thermostatic element at a later period. Now if the gas should suddenly be cut of from the main supply, or be blown out, the cooling off of the thermostatic element will cause the same to move in the opposite direction, bringing the contact finger 20 into contact with the binding post 16 and thus complete a circuit through the structure of the gas stove and the wires a, b, c, to the battery 14 and bell 15, causing the bell 15 to sound an alarm so as to call the attention of the' operator, to the fact that the gas supply has been discontinued, or that the flame has been blown out. The operator can now shut off the gas supply by closing the cock 12, or wait until the gas flow is again continued, and ignitng the same at' the burner of the stove. If the alarm were not provided, the later restablishment of the flow of gas would cause the room in which the gas stove is located to become filled with gas, which would result in an explosion, if the operator's attention had not previously been called to the fact that the gas flow had been discontinued, by the ,action of my thermo-electric alarm.

It will be understood that the cam 22, can be reset or placed in proper position by merely manipulating the knob or lever 23, and that the movement of the cam out of the way of the thermostatic element is accomplished by the gravitating movement of'the tail 24, when the thermostatic element initially is disengaged from the cam.

From the foregoing description it will be seenthat the device described is of a simple Construction and consists of few parts that cannot readily get out of order, and that a positive action of the alarm can be readily obtained, especially when the thermostatic element is made highly sensitive 'to the action of heat or cold, so as to eflect a ready action thereof.

' Having described my invention, I claim 1. In a thermo-electric alarm the combination with a frame and a thermostatic element mounted on the frame and movable to engage an electric contact, of a weighted cam mounted on the frame and movable to actuate the thermostatic element to normally hold the same out of electric contact, said thermostatic element when subjected to the action of heat, being adapted to release said cam so that the weighted portion'thereof will gravitate the cam into a position out of the way of the action of said thermostatic element, enabling the thermostatic element, when the latter cools, to engage said electric contact.

2. In a device of the character described, the combinationwith a frame and a thermostatic element mounted on the frame and movable to close an electric circuit, a contact member adapted to be engaged by said thermostatic element and a gravitationally movable cam-like member mounted to Swing on the frame and movable to engage the thermo: static element andnormally hold it out of contact with said contact member.

In testimony whereof I aflix my signature.

ANTON HASLINGER. 

